Back-pressure valve for traps.



PATENTBD JUNE 2, 1903.

v -W. EEONNELL. ASK PRESSURE VALVE EOE TREES.l

APPLIOATIQN FILED SEPT.13 1902.

,Wiliam R50 N0 MODEL.

'mi Ncmms Pz'rcns co4. Pacman-No., wAsnmsTaN, D. c.

NrrED I STATES Patented fune 2, 1903.

v PATENT EEIGE.V

WTLLIAM R. RoNNELL, E ELIZABETH, NEW `JERSEY, AssIeNoR or oNE- FOURTH To GRACE MAY LEVI, or ELIZABETH, NEW JERSEY.

BACK-PRESSURE VALVE FOR TRAPS.

SEEGEFECATION forming part of Letters Patent N o. 729,996, dated June 2, 1903. Application tiled September 13, IQVOHZ. Serial No. 123,206. (No model.)

To @ZZ whom it pta/y concern:

Beit known that LWILLIAM R. BoNNELL, a

citizen of the United States, residing at Elizabeth, in the county of Union and State of New `Jersey, have invented certain new and useful Improvements in Back-Pressure Valves for Traps, of which the following is afull and complete specication, such as will enable those skilled in the art to which it appertains to make and use the same.

The object of this invention is to provide an limproved back-pressure valve for traps or sinks designed for use in cellars, kitchens, closets, and other places ofV this kind; and with this and other objects in view the invention consists in a device of the class specied constructed as hereinafter described and claimed.

The invention is fully disclosed in the following specioation, of which the accompanying drawings form apart, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which l Figure lis a vertical section of an ordinary sink-trap provided witlr my improvement;

Fig. 2, a plan view of the entrance-tube of the trap and showing my improvement therein, and Fig. 3 a section on the line 3 3 of Fig. l.

In the drawings forming part of this speciication I haveshown ata an ordinary sinktrap, and in the practice of my invention I securein the entrance-tube a2. thereof a valvecasing b, which is tubular in form, and this connection is preferably made by means of a tubular bushing or packing c, which may be composed of anyl suitable material. The valve-casing b is tubular in form, and the upper end thereof is screw-threaded internally, as shown at b2, and screwed thereinto .is a stopper d, which is hollow and substantially semispherical in form, the convex side thereof being directed downwardly and provided with a port or passage cl2, while the upper side thereof is concave in form and perforated, as shown at cl3.

In the lower end of the valve-casing b is placed a detachable valve-cage e, comprising a ring e2 and cup-shaped cross-wires e3, and in this cage is placed ajball-valve f. TheV ring e2 of the valve-cage e isfconnected with be inserted and removed from the top of the valve-casing..

The stopper d may be screwed into the valvey casing or removed therefrom when desired by means of an ordinary Spanner, and the operation will be readily understood from the foregoing description when taken in connec tion with the accompanying drawings and the following statement thereof. y

The valve f may becomposed of rubber or any suitable material, and it will be apparent that any back pressure through the trap will cause said valve to rise and close the port or passage cl2, as indicated in dotted lines in Fig. 1, and the relative dimensions of the valve f and the valve-casing b are such that the valve f when raised into the position shown in dotted lines in Fig. 1 will always close the port or passage d2.v

Whenever it is desired to clean out the trap a or repair the same, Lthe plug (l and the valvecage e, with the valve f, may all be removed, as will be readily understood, andthe trap may be cleaned through the valve-casing b, and, if desired, the valve-casing b and the tubular casing or backing c may also be removed.

Having fully described my invention, what Iclaim as new, and desire to secure by Letters Patent, is

1. A sink-trap the entrance-arm of which is provided with a tubular valve-casing in the bottom of which is secu red a detachable valvecasing provided with a spherical valve and the upper end of said casing being closed by a detachable hollow plug which is substantially semispherical in form, the convex side thereof being directed downwardly and provided with a centra] port or passage, and the upper side thereof being perforated, substansage in the lower memhel1 of said hollow plug, my invention I have signed my name, in pres- :L hollow ball-valve operating in said casing ence of the subscribing Witnesses, this 12th zo :md with said port o1 passage and means for day of September, 1902.

holding said ball-valve Within said casino" 1 consisting of a detachable cage in the bo; WILLIAM R BONNLLL' rom thereof, substantially as shown and de- Witnesses:

L'cl-ibed. F. A. STEWART,

In Leslym-'vny that I Claim the foregoing as C, E. MULREANY. 

